Numerical Investigation of Effect of Compaction on Serviceability Behavior of Geosynthetic Reinforced Structures

Abstract

Geosynthetic Reinforced Structures (GRS) play a pivotal role in various construction applications, serving as reinforced retaining structures, bridge abutments, and slope stabilizers. The technology employs geotextile or geogrids in backfill layers to develop tensile strength through friction and interlocking with the soil, minimizing settlement issues. GRS mechanisms involve apparent cohesion development, increased confining pressure, and potential soil dilatancy suppression. Research on GRS behavior encompasses factors like reinforcement spacing, stiffness, compaction effects, facing rigidity, and seismic behavior. This study addresses a gap in understanding the impact of compaction load on lateral wall deformation during the serviceability stage. Utilizing Finite Element Method (FEM) 2D, the numerical model investigates compaction load effects on lateral wall deformation and reinforcement axial strain. Experimental findings underscore the influence of backfill compaction on soil stiffness and deformation reduction. Parametric analysis reveals compaction's substantial role in resisting lateral deformation, with decreased vertical reinforcement spacing and increased axial stiffness correlating with diminished lateral wall deformation. The study emphasizes that heavy compaction effectively mitigates both vertical and lateral deformation induced by traffic loads. Field modeling of a Geosynthetic Reinforced Bridge abutment validates these findings, showcasing the practical significance of compaction